1考查干燥管的常规用途(1)作为干燥装置。在使用时需注意以下两点:①干燥管的粗端为气体进口,细端为气体出口。使用时粗端应配上带导管的橡皮塞,细端接上橡皮管,以便和其他仪器导管连接。②干燥管内填装干燥剂时,应先在细端内口塞一团胶脂棉。棉团的作用是堵住干燥剂不让其流散 1 Check the general use of the drying pipe (1) as a drying device. The following two points should be noted when using: 1 The thick end of the drying tube is the gas inlet, and the fine end is the gas outlet. When used, the thick end should be equipped with a rubber stopper with a catheter, and the thin end should be connected with a rubber tube so as to be connected with the catheter of other instruments. 2 When desiccant is filled in the drying pipe, a pack of rubber wool should be stuffed in the fine end. The role of cotton is to block the desiccant so that it does not disperse